Near-Unity Photoluminescence Quantum Yield in Blue-Emitting Cs3Cu2Br5- xIx(0 ≤ x ≤ 5)

Rachel Roccanova; Aymen Yangui; Hariharan Nhalil; Hongliang Shi; Mao Hua Du; Bayrammurad Saparov

doi:10.1021/acsaelm.9b00015

Near-Unity Photoluminescence Quantum Yield in Blue-Emitting Cs₃Cu₂Br_{5- x}I_x(0 ≤ x ≤ 5)

Rachel Roccanova
, Aymen Yangui
, Hariharan Nhalil
, Hongliang Shi
, Mao Hua Du
, Bayrammurad Saparov^*

^*Corresponding author for this work

School of Physics

University of Oklahoma
Bar-Ilan University
Oak Ridge National Laboratory

Research output: Contribution to journal › Article › peer-review

220 Scopus citations

Abstract

Recently, interest in developing efficient, low-cost, nontoxic, and stable metal halide emitters that can be incorporated into solid-state lighting technologies has taken hold. Here we report nontoxic, stable, and highly efficient blue-light-emitting Cs3Cu2Br5-xIx (0 ≤ x ≤ 5). Room-temperature photoluminescence measurements show bright blue emission in the 456 to 443 nm range with near-unity quantum yield for Cs3Cu2I5. Density functional theory calculations and power-dependent PL measurements suggest that the emission results from self-trapped excitons induced by strong charge localization within the zero-dimensional cluster structure of Cs3Cu2Br5-xIx.

Original language	English
Pages (from-to)	269-274
Number of pages	6
Journal	ACS Applied Electronic Materials
Volume	1
Issue number	3
DOIs	https://doi.org/10.1021/acsaelm.9b00015
State	Published - 26 Mar 2019

Keywords

0D all-inorganic metal halides
Pb-free
density functional theory
high blue photoluminescence quantum yield
thermal and air stability

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10.1021/acsaelm.9b00015

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title = "Near-Unity Photoluminescence Quantum Yield in Blue-Emitting Cs3Cu2Br5- xIx(0 ≤ x ≤ 5)",

abstract = "Recently, interest in developing efficient, low-cost, nontoxic, and stable metal halide emitters that can be incorporated into solid-state lighting technologies has taken hold. Here we report nontoxic, stable, and highly efficient blue-light-emitting Cs3Cu2Br5-xIx (0 ≤ x ≤ 5). Room-temperature photoluminescence measurements show bright blue emission in the 456 to 443 nm range with near-unity quantum yield for Cs3Cu2I5. Density functional theory calculations and power-dependent PL measurements suggest that the emission results from self-trapped excitons induced by strong charge localization within the zero-dimensional cluster structure of Cs3Cu2Br5-xIx.",

keywords = "0D all-inorganic metal halides, Pb-free, density functional theory, high blue photoluminescence quantum yield, thermal and air stability",

author = "Rachel Roccanova and Aymen Yangui and Hariharan Nhalil and Hongliang Shi and Du, \{Mao Hua\} and Bayrammurad Saparov",

note = "Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = mar,

day = "26",

doi = "10.1021/acsaelm.9b00015",

language = "英语",

volume = "1",

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journal = "ACS Applied Electronic Materials",

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TY - JOUR

T1 - Near-Unity Photoluminescence Quantum Yield in Blue-Emitting Cs3Cu2Br5- xIx(0 ≤ x ≤ 5)

AU - Roccanova, Rachel

AU - Yangui, Aymen

AU - Nhalil, Hariharan

AU - Shi, Hongliang

AU - Du, Mao Hua

AU - Saparov, Bayrammurad

PY - 2019/3/26

Y1 - 2019/3/26

N2 - Recently, interest in developing efficient, low-cost, nontoxic, and stable metal halide emitters that can be incorporated into solid-state lighting technologies has taken hold. Here we report nontoxic, stable, and highly efficient blue-light-emitting Cs3Cu2Br5-xIx (0 ≤ x ≤ 5). Room-temperature photoluminescence measurements show bright blue emission in the 456 to 443 nm range with near-unity quantum yield for Cs3Cu2I5. Density functional theory calculations and power-dependent PL measurements suggest that the emission results from self-trapped excitons induced by strong charge localization within the zero-dimensional cluster structure of Cs3Cu2Br5-xIx.

AB - Recently, interest in developing efficient, low-cost, nontoxic, and stable metal halide emitters that can be incorporated into solid-state lighting technologies has taken hold. Here we report nontoxic, stable, and highly efficient blue-light-emitting Cs3Cu2Br5-xIx (0 ≤ x ≤ 5). Room-temperature photoluminescence measurements show bright blue emission in the 456 to 443 nm range with near-unity quantum yield for Cs3Cu2I5. Density functional theory calculations and power-dependent PL measurements suggest that the emission results from self-trapped excitons induced by strong charge localization within the zero-dimensional cluster structure of Cs3Cu2Br5-xIx.

KW - 0D all-inorganic metal halides

KW - Pb-free

KW - density functional theory

KW - high blue photoluminescence quantum yield

KW - thermal and air stability

UR - https://www.scopus.com/pages/publications/85065874710

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DO - 10.1021/acsaelm.9b00015

M3 - 文章

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JF - ACS Applied Electronic Materials

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ER -

Near-Unity Photoluminescence Quantum Yield in Blue-Emitting Cs₃Cu₂Br_{5- x}I_x(0 ≤ x ≤ 5)

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Keywords

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